Optimal. Leaf size=46 \[ -\frac {b \sqrt {a-b x^4}}{3 a^2 x^2}-\frac {\sqrt {a-b x^4}}{6 a x^6} \]
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Rubi [A] time = 0.01, antiderivative size = 46, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {271, 264} \[ -\frac {b \sqrt {a-b x^4}}{3 a^2 x^2}-\frac {\sqrt {a-b x^4}}{6 a x^6} \]
Antiderivative was successfully verified.
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Rule 264
Rule 271
Rubi steps
\begin {align*} \int \frac {1}{x^7 \sqrt {a-b x^4}} \, dx &=-\frac {\sqrt {a-b x^4}}{6 a x^6}+\frac {(2 b) \int \frac {1}{x^3 \sqrt {a-b x^4}} \, dx}{3 a}\\ &=-\frac {\sqrt {a-b x^4}}{6 a x^6}-\frac {b \sqrt {a-b x^4}}{3 a^2 x^2}\\ \end {align*}
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Mathematica [A] time = 0.01, size = 30, normalized size = 0.65 \[ -\frac {\sqrt {a-b x^4} \left (a+2 b x^4\right )}{6 a^2 x^6} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.78, size = 26, normalized size = 0.57 \[ -\frac {{\left (2 \, b x^{4} + a\right )} \sqrt {-b x^{4} + a}}{6 \, a^{2} x^{6}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.18, size = 68, normalized size = 1.48 \[ -\frac {2 \, {\left (3 \, {\left (\sqrt {-b} x^{2} - \sqrt {-b x^{4} + a}\right )}^{2} - a\right )} \sqrt {-b} b}{3 \, {\left ({\left (\sqrt {-b} x^{2} - \sqrt {-b x^{4} + a}\right )}^{2} - a\right )}^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.01, size = 27, normalized size = 0.59 \[ -\frac {\sqrt {-b \,x^{4}+a}\, \left (2 b \,x^{4}+a \right )}{6 a^{2} x^{6}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.37, size = 36, normalized size = 0.78 \[ -\frac {\frac {3 \, \sqrt {-b x^{4} + a} b}{x^{2}} + \frac {{\left (-b x^{4} + a\right )}^{\frac {3}{2}}}{x^{6}}}{6 \, a^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 1.19, size = 26, normalized size = 0.57 \[ -\frac {\sqrt {a-b\,x^4}\,\left (2\,b\,x^4+a\right )}{6\,a^2\,x^6} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 1.74, size = 189, normalized size = 4.11 \[ \begin {cases} - \frac {\sqrt {b} \sqrt {\frac {a}{b x^{4}} - 1}}{6 a x^{4}} - \frac {b^{\frac {3}{2}} \sqrt {\frac {a}{b x^{4}} - 1}}{3 a^{2}} & \text {for}\: \left |{\frac {a}{b x^{4}}}\right | > 1 \\\frac {i a^{2} b^{\frac {3}{2}} \sqrt {- \frac {a}{b x^{4}} + 1}}{- 6 a^{3} b x^{4} + 6 a^{2} b^{2} x^{8}} + \frac {i a b^{\frac {5}{2}} x^{4} \sqrt {- \frac {a}{b x^{4}} + 1}}{- 6 a^{3} b x^{4} + 6 a^{2} b^{2} x^{8}} - \frac {2 i b^{\frac {7}{2}} x^{8} \sqrt {- \frac {a}{b x^{4}} + 1}}{- 6 a^{3} b x^{4} + 6 a^{2} b^{2} x^{8}} & \text {otherwise} \end {cases} \]
Verification of antiderivative is not currently implemented for this CAS.
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